import java.util.Arrays;
import java.util.Scanner;

public class Test {

    public static int func(int [] array){
        int len = array.length;
        for (int i = 0; i < len; i++) {
            for (int j = i + 1; j < len; j++) {
                if(array[i] == array[j]){
                    return Arrays.toString(i,j);
                }
            }
        }
    }

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int sum = scan.nextInt();
        int [] array = {1,2,3,4,5,6,7,8,9,10};
        func(array);
    }
}
